CN113070350A - Fixed type bending and shifting roller assembly structure, roller shifting device and roller shifting method - Google Patents
Fixed type bending and shifting roller assembly structure, roller shifting device and roller shifting method Download PDFInfo
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- CN113070350A CN113070350A CN202110518632.7A CN202110518632A CN113070350A CN 113070350 A CN113070350 A CN 113070350A CN 202110518632 A CN202110518632 A CN 202110518632A CN 113070350 A CN113070350 A CN 113070350A
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- 238000005452 bending Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 32
- 238000013000 roll bending Methods 0.000 claims description 11
- 230000005465 channeling Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
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Abstract
The invention belongs to the technical field of plate/strip mill, and provides a fixed type bending and shifting roller assembly structure, a roller shifting device and a roller shifting method. The roller assembly structure comprises a roller, a locking device, a roller bending device and a roller shifting device, wherein radial bearings are respectively arranged at two ends of the roller; one end of the roller is also provided with a thrust bearing; the roll shifting device is arranged as one, acts on the thrust bearing block and is arranged coaxially with the roller. The roll shifting method is that when the rolling mill shifts roll, the roll shifting device drives the thrust bearing pedestal to axially shift together with the roll, and the roll axially slides relative to the two radial bearing pedestals. The invention can solve the problem of unbalance loading of the bearing and the roller bending cylinder after the fixed type bending and shifting roller has a shifting roller.
Description
Technical Field
The invention belongs to the technical field of plate/strip steel rolling mills, and particularly relates to a fixed type bending and shifting roller assembly structure, a roller shifting device and a roller shifting method.
Background
In the field of plate/strip mills, roll bending and roll shifting are important means for controlling plate shape and balancing roll wear. In the aspect of the current plate/belt hot rolling, with the progress of bending channeling technology in recent years, fixed bending channeling (a bending roller cylinder is fixed and does not move along with a working roller) is gradually replacing movable bending channeling (the bending roller cylinder moves along with the working roller) to become the main stream of the market, the roller channeling mode is to make a roller, a bearing and a bearing seat thereof axially shift (the same as the movable bending channeling) together, and the bending roller cylinder does not shift, so that the problem that the roller bearing shifts relative to the center of the bending roller cylinder after the roller shifting, so that the problem of the offset load of the roller bearing or the bending roller cylinder and the like is caused. For example, in the existing patents CN200680037764.1, CN200710203401.7, ZL 201510174767.0, etc., the unbalance loading problem is solved by controlling the resultant force of the roll bending cylinders or adding a guide beam, but the equipment structure or control loop of the roll bending device is relatively complex, and the difficulty of the design, manufacture and control of the equipment structure is also increased. Therefore, how to simplify the equipment structure and solve the problem of unbalanced load of a roll bearing or a roll bending cylinder and the like is the core problem of fixed type bending design.
Disclosure of Invention
In view of the above, the present invention provides a fixed type shifting roll assembling structure, a shifting device and a shifting method, so as to keep the relative position of the roll bearing and the center of the roll bending cylinder at any roll shifting position unchanged, thereby avoiding the eccentric load of the roll bearing or the roll bending cylinder.
The invention is realized by the following technical scheme:
the invention provides a fixed type roll shifting device for a bending shifting roller, which comprises a roll shifting hydraulic cylinder consisting of a cylinder body, a piston rod and a cylinder cover, wherein a sliding sleeve is sleeved on the cylinder body, one of the cylinder body and the piston rod is provided with a guide block which forms axial sliding and radial limitation with the sliding sleeve, and the other of the cylinder body and the piston is fixedly connected with the sliding sleeve.
The invention also provides a fixed type bending and shifting roller assembly structure, which comprises a roller, a locking device, a roller bending device and the roller shifting device; two ends of the roller are respectively provided with a radial bearing which slides axially relative to the roller neck and is respectively provided with a radial bearing seat; the outer end of the roll at the fixed end of the rolling mill is provided with a thrust bearing which is axially limited relative to the roll neck and is provided with a thrust bearing seat; the roll shifting device is arranged in a single way, acts on the thrust bearing seat and is coaxially arranged with the roller, and a sliding sleeve in the roll shifting device is fixed on the fixed end of the rolling mill; the two radial bearing blocks are respectively provided with a roller bending device correspondingly; one of the two radial bearing seats is fixedly connected to the mill housing through a locking device, and a connecting rod is arranged between the two radial bearing seats.
Furthermore, a guide block in the roller shifting device is arranged on a cylinder body, the cylinder body is fixedly connected with the thrust bearing seat, the cylinder body and the roller axially shift together, and a piston rod in the roller shifting device is fixedly connected with the sliding sleeve through a flange, a base plate and a clamping plate at the far end departing from the thrust bearing seat.
Further, a lining is arranged between the sliding sleeve and the cylinder body in the roller shifting device.
Furthermore, a guide block in the roller shifting device is arranged on a piston rod through a base plate, the base plate arranged on the piston rod is fixedly connected with a thrust bearing seat, the piston rod axially shifts with the roller, the far end of the piston rod, which deviates from the thrust bearing seat, extends out of the sliding sleeve, and a cylinder body in the roller shifting device is connected with the sliding sleeve in a positioning mode through a cylinder cover.
Further, the basal disc and the guide block are of an integral structure.
Furthermore, the radial bearing is a four-row conical roller bearing, and the thrust bearing is a two-row conical roller bearing; at most two radial bearings are arranged in a single radial bearing seat side by side; the length of the roll neck of the roll which moves in cooperation with the radial bearing is at least twice larger than the width of the radial bearing.
Further, the structure that the sliding sleeve is fixed on the fixed end of the rolling mill is as follows: the sliding sleeve is directly connected with a radial bearing seat arranged at the fixed end of the rolling mill or connected with the radial bearing seat through a locking device.
The invention also provides another alternative scheme of the fixed type bending and channeling roll assembling structure, which comprises the following steps: the two roll shifting devices symmetrically arranged on two sides of the central axis of the roller replace one roll shifting device coaxially arranged on the central axis of the roller, cylinder bodies of the two roll shifting devices are respectively fixed on the fixed end of the rolling mill, sliding sleeves of the two roll shifting devices act on a thrust bearing seat and axially shift together with the roller, and the sliding sleeves are axially matched with the cylinder bodies in a sliding manner through piston rods fixedly connected with the sliding sleeves; and a guide rod which axially slides and radially limits is arranged between the thrust bearing seat and the adjacent radial bearing seat.
The invention also provides a fixed type bending and fleeing roller shifting method, which is based on the fixed type bending and fleeing roller assembling structure and comprises the following steps: when the rolling mill has a roll shifting, the roll shifting device drives the thrust bearing blocks and the thrust bearings on the thrust bearing blocks to axially shift together with the rolling roll, and the rolling roll axially slides relative to the two radial bearing blocks and the radial bearings on the radial bearing blocks.
The invention has the advantages that: the roller assembly structure, the roller shifting device and the roller shifting method solve the problem of unbalance loading of the bearing and the roller bending cylinder after the fixed type bent shifting roller shifting, and achieve the aims of only shifting the roller, not shifting the radial bearing and the radial bearing seat thereof during the roller shifting.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a diagram showing the assembly relationship of the roll assembling and shifting device of the present invention in a rolling mill housing;
FIG. 2 shows the roll assembly, roll shifting apparatus of the present invention in a roll shifting zero position;
FIG. 3/4 shows a state where the roll shifting apparatus of the present invention is shifted to both sides of the roll;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 6 is an embodiment of a roll shifting apparatus of the present invention on a conventional roll shifting manner;
FIG. 7 is another embodiment of a roll-shifting apparatus of the present invention;
fig. 8 is another embodiment of the roll assembly structure of the present invention.
Reference numerals: 1 is a radial bearing seat A; 2 is a radial bearing A; 3, a roller; 4 is a radial bearing seat B; 5 is a radial bearing B; 6, a thrust bearing; 7 is a thrust bearing seat; 8 is an end cover A; 9 is an end cover B; 10 is an end cover C; 11 is a connecting rod; 12 is a liner ring; 13 is a guide block; 14 is a cylinder body; 15 is a sliding sleeve; 16 is a bushing; 17 is a cylinder cover; 18 is a flange; 19 is a piston rod; 20 is a backing plate; 21 is a clamping plate; 22 is a locking device; 23 is a roll bending device; 24 is a rolling mill housing; 25 is a guide rod; 26 is a roll shifting device; a base plate 27.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Example one
As shown in fig. 1-5, the fixed type bending and shifting roll assembly structure in the present embodiment includes a roll 3, a locking device 22, a roll bending device 23, a roll shifting device 26, and a mill housing 24, where the roll 3 may be respectively defined with a fixed end and a free end according to its roll shifting state, that is, the roll 3 is axially provided with two sides as a roll neck and a middle as a roll body, and only one (or two) radial bearing is arranged at the roll neck at one side for bearing radial force and is provided with a free end; the roll neck on the other side is simultaneously provided with one (or two) radial bearing and a two-way thrust bearing which are respectively used for bearing radial force and axial force and are fixed ends, wherein the radial bearing is close to the roll body, and the thrust bearing is close to the end of the roll. Thus, the roller 3 is provided with a radial bearing B5 which axially slides relative to the roll neck and is provided with a radial bearing seat B4 at the fixed end of the rolling mill, the roller 3 is provided with a radial bearing A2 which axially slides relative to the roll neck and is provided with a radial bearing seat A1 at the free end of the rolling mill, and the roller 3 is also provided with a thrust bearing 6 which is positioned outside the radial bearing B5 and axially limited relative to the roll neck and is provided with a thrust bearing seat 7 at the fixed end of the rolling mill; the roll shifting device 26 acts on the thrust bearing seat 7 and provides axial shifting force for the roll 3; the two sets of roller bending devices 23 respectively act on the radial bearing seat A1 and the radial bearing seat B4 and provide radial roller bending force for the roller 3; a connecting rod 11 is arranged between the radial bearing seat A1 and the radial bearing seat B4, and one of the radial bearing seat A1 and the radial bearing seat B4 is fixedly connected through a locking device 22; the locking device 22 also acts on the mill housing 24 and serves to limit the axial displacement of the radial bearing seat B4 (or radial bearing seat a 1); the thrust bearing seat 7 and the adjacent radial bearing seat B4 are in a relative radial limited and axial sliding structure.
Specifically, each set of roller assembly structure consists of a roller, a pair (or two pairs) of radial bearings and bearing seats thereof, and a bidirectional thrust bearing and bearing seats thereof. The radial bearing and the thrust bearing are arranged in respective independent bearing seats, namely the outer ring of the radial bearing A2 (radial bearing B5) is fixed in the corresponding radial bearing seat A1 (radial bearing seat B4), the radial bearing seat is internally provided with an axial limit and cannot axially move relative to the radial bearing, the inner ring of the radial bearing is in clearance fit with the roll neck of the roll, and the inner ring of the radial bearing is not provided with the axial limit and can axially move relative to the roll 3. The inner ring of the thrust bearing 6 is fixed on the roll neck, the outer ring is fixed on the thrust bearing seat 7, the inner ring and the outer ring of the thrust bearing are respectively provided with axial limit on the roll neck and the thrust bearing seat 7, and the thrust bearing seat 7 and the thrust bearing 6 can not axially move on the roll 3. Meanwhile, the radial bearing seat B4 at the fixed end of the rolling mill and the radial bearing seat A1 at the free end of the rolling mill are connected together in a mechanical mode, namely, the connecting rods 11 are connected and guided by the window of the housing 24 of the rolling mill where the connecting rods are located, meanwhile, the mechanical locking device 22 is arranged on the housing 24 of the rolling mill to limit the axial displacement of the housing, and under the action of the bending force of the bending device 23, the radial bearing and the radial bearing seat thereof can only lift in the window of the housing of the rolling mill but cannot axially float, so that the bending force and the center of the radial bearing are always coincided, and unbalance loading is avoided. In addition, the thrust chock 7 is axially guided and prevented from rotating by the guide part matched with the corresponding roll shifting device 26 or/and the adjacent radial chock B4, and the roll 3 is driven to axially shift under the action of the roll shifting device 26, while the radial chock B4 does not shift. The roll bending device 23 and the roll shifting device 26 are driven by hydraulic cylinders. When the roll shifting device works, only the roll, the thrust bearing and the bearing seat thereof axially shift, the radial bearing of the roll and the bearing seat thereof do not shift, and the roll neck of the roll axially slides relative to the radial bearing.
In the present embodiment, the radial bearing a2 and the radial bearing B5 each employ a four-row conical roller bearing, and the thrust bearing 6 employs a two-row conical roller bearing. The end cover C10 is fixed together with the radial bearing seat A1 or the radial bearing seat B4 through bolts and used for axially limiting the outer ring of the radial bearing A2 or the radial bearing B5, and a step for abutting against the radial bearing is arranged at the inner side end corresponding to the end cover C10 in the radial bearing seat. Similarly, the end cover A8 is fixedly connected with the thrust bearing seat 7 through a bolt and is used for axially limiting the outer ring of the thrust bearing 6. The two ends of the inner ring of the thrust bearing 6 are respectively pressed on the end part of the roll neck at one side of the roll 3 through the lining ring 12 and the end cover B9 and used for limiting the axial direction of the inner ring of the thrust bearing 6. At most two radial bearings a2 or B5 are arranged on a single radial bearing seat a1 or B4. The roll 3 runs in a roll neck length that is greater than the width of the radial bearing a2 (radial bearing B5) by at least one time (typically 150+150 to 300mm) at the point where the radial bearing a2 (radial bearing B5) fits into the roll neck.
The axial locking of the radial bearing seat in this embodiment is: one end of the radial bearing seat B4 has a male locking ear (not labeled) and the other end is mechanically connected to the radial bearing seat A1 by a linkage 11. The locking ears are embedded in the clamping grooves formed by the roller bending device 23 and the locking device 22, so that the axial limit of the radial bearing seat A1 and the radial bearing seat B4 is realized. The sides of the radial chocks are guided by the roll bending device 23, and the radial chocks a1 and B4 and their radial bearings a2 and B5 do not move axially during roll shifting of the roll 3.
The roll shifting device 26 in the embodiment is arranged on the central axis of the roller 3, namely the roll shifting device and the roller are in a coaxial arrangement structure, adopt a double-rod hydraulic cylinder form and comprise a cylinder body 14, a piston rod 19, a cylinder cover 17, a sliding sleeve 15 and the like; the piston rod 19 is coaxial with the roller 3, the sliding sleeve 15 is sleeved on the cylinder body 14 and is fixedly connected with a radial bearing seat B4 adjacent to the thrust bearing seat 7, one end of the piston rod 19 is slidably connected with the roller 3, the other end of the piston rod is fixedly connected with one end of the sliding sleeve 15, which is far away from the radial bearing seat B4, the guide block 13 is fixedly arranged on the cylinder body 14 and is slidably connected with the sliding sleeve 15, and the cylinder body 14 is fixedly connected with the thrust bearing seat 7 and is slidably connected with the sliding sleeve 15. In this way, the thrust chock 7 is directly fixed with the cylinder 14 of the roll shifting device 26, and the thrust chock 7 is prevented from rotating and guided by the roll shifting device 26 to ensure that the thrust chock does not rotate together with the roll.
In the present embodiment, a bushing 16 is provided between the sliding sleeve 15 and the cylinder 14, and the piston rod 19 and the sliding sleeve 15 are fixedly connected by a flange 18, a backing plate 20 and a clamping plate 21. The bush 16 is in interference connection with the sliding sleeve 15 and in clearance fit with the cylinder 14, so that the axial guidance of the cylinder 14 and the thrust bearing block 7 is realized.
Example two
As shown in fig. 6, the present embodiment is different from the above embodiments in that: the fixed connection of the sliding sleeve 15 to the radial bearing seat B4 is implemented by the locking device 22. I.e. by the locking means 22 engaging with a locking ear (not marked) provided on the sliding sleeve 15 for a direct fixed connection. Thus, when the roll is shifted, the cylinder 14 moves axially together with the thrust chock 7, the roll 3, and the like, and is restricted by the lock 22, so that neither the piston rod 19 nor the radial chock B4 can move axially. The roller shifting device is combined with conventional roller assembly to realize roller shifting (axial shifting of the bearing seat and the roller) in a traditional mode, the cylinder body is installed together with the bearing seat at the moment, the locking lug is arranged on the sliding sleeve, the locking lug on the roller bearing seat is cancelled, the locking device on the rolling mill housing 24 limits the axial displacement of the sliding sleeve, and the roller and the whole axial shifting of the bearing seat can be realized under the action of hydraulic oil.
Example two
As shown in fig. 7, the present embodiment is different from the first and second embodiments in that: the cylinder 14 is fixedly connected with the sliding sleeve 15 to replace the fixed connection of the cylinder 14 and the thrust bearing seat 7, the piston rod 19 is fixedly connected with the thrust bearing seat 7 to replace the connection of the piston rod 19 and the roller 3, the guide block 13 is connected with the piston rod 19 through the base plate 27 to replace the fixed connection of the guide block 13 and the cylinder 14, and the piston rod 19 extends out of the sliding sleeve 15 at the end away from the roller 3 to replace the fixed connection of the piston rod 19 and the sliding sleeve 15. In this way, the thrust bearing seat 7 is fixed with the piston rod 19 of the roller-shifting device 26, and the thrust bearing seat 7 can be prevented from rotating and guided by the roller-shifting device 26, so that the thrust bearing seat is ensured not to rotate along with the roller.
Example four
As shown in fig. 8, the present embodiment is different from the above embodiments in that: two roll shifting devices 26 symmetrically arranged on two sides of the central axis of the roller 3 replace one roll shifting device 26 coaxially arranged on the central axis of the roller 3, cylinder bodies 14 of the two roll shifting devices 26 are respectively fixed on the fixed end of a rolling mill, sliding sleeves 15 of the two roll shifting devices 26 act on thrust bearing blocks 7 and axially shift together with the roller 3, and the sliding sleeves 15 are in axial sliding fit with the cylinder bodies 14 through piston rods 19 fixedly connected with the sliding sleeves 15; an axially sliding and radially limited guide rod 25 is arranged between the thrust bearing seat 7 and the radial bearing seat B4 adjacent to the thrust bearing seat. In this way, the adopted guide rod 25 is arranged on the thrust bearing seat 7 and is in sliding connection with the radial bearing seat B4 adjacent to the thrust bearing seat 7, or the guide rod 25 is arranged on the radial bearing seat B4 adjacent to the thrust bearing seat 7 and is in sliding connection with the thrust bearing seat 7; the thrust chock 7 is prevented from rotating and guided directly by the guide rod 25 in cooperation with the radial chock B4 to ensure that the thrust chock does not rotate with the roll. Locking lugs (not marked) arranged on the thrust bearing seat 7 are embedded in locking grooves of roll shifting devices 26 on two sides of a rolling mill housing 24 to realize axial positioning of the roller 3 and the thrust bearing seat 7, and the axial locking device 22 of the radial bearing seat is arranged at the other end of the roller 3. In addition, in order to ensure that the sliding sleeve and the cylinder body in the roller shifting device do not rotate radially, a guide block can be arranged on the cylinder body to limit the radial rotation of the sliding sleeve.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The fixed roller shifting device for the bending shifting roller comprises a roller shifting hydraulic cylinder consisting of a cylinder body (14), a piston rod (19) and a cylinder cover (17), and is characterized in that the cylinder body is sleeved with a sliding sleeve (15), one of the cylinder body and the piston rod is provided with a guide block (13) which forms axial sliding and radial limitation between the sliding sleeves, and the other one of the cylinder body and the piston is fixedly connected with the sliding sleeve.
2. A fixed type shifting roll assembling structure comprising a roll (3), a locking device (22) and a roll bending device (23), characterized by further comprising a roll shifting device (26) according to claim 1; two ends of the roller are respectively provided with a radial bearing which slides axially relative to the roller neck and is respectively provided with a radial bearing seat; the outer end of the roll at the fixed end of the rolling mill is provided with a thrust bearing (6) which is axially limited relative to the roll neck and is provided with a thrust bearing seat (7); the roll shifting device is arranged in a single way, acts on the thrust bearing seat and is coaxially arranged with the roller, and a sliding sleeve in the roll shifting device is fixed on the fixed end of the rolling mill; the two radial bearing blocks are respectively provided with a roller bending device correspondingly; one of the two radial bearing seats is fixedly connected on a rolling mill housing (24) through a locking device, and a connecting rod (11) is arranged between the two radial bearing seats.
3. The fixed type channeling roll assembly structure as claimed in claim 2, wherein the guide block in the roll shifting device is arranged on a cylinder body, the cylinder body is fixedly connected with a thrust bearing seat, the cylinder body and the roll axially shift together, and a piston rod in the roll shifting device is fixedly connected between the far end departing from the thrust bearing seat and the sliding sleeve through a flange (18), a backing plate (20) and a clamping plate (21).
4. The fixed type roll assembly structure of claim 2, wherein a bushing (16) is further arranged between the sliding sleeve and the cylinder body in the roll shifting device.
5. The fixed type channeling roll assembling structure as claimed in claim 2, wherein a guide block in the roll shifting device is arranged on a piston rod through a base plate (27), the base plate arranged on the piston rod is fixedly connected with a thrust bearing seat, the piston rod axially shifts with the roll, the far end of the piston rod, which is far away from the thrust bearing seat, extends out of the sliding sleeve, and a cylinder body in the roll shifting device is connected with the sliding sleeve in a positioning manner through a cylinder cover.
6. The fixed channeling roll assembly structure of claim 5, wherein the base plate and the guide block are of a unitary construction.
7. The fixed type roll assembly structure of claim 2, wherein the radial bearing is a four-row conical roller bearing and the thrust bearing is a two-row conical roller bearing; at most two radial bearings are arranged in a single radial bearing seat side by side; the length of the roll neck of the roll, which moves in cooperation with the radial bearing, is at least one time greater than the width of the radial bearing.
8. The fixed type channeling roll assembling structure according to claim 2, wherein the structure that the sliding sleeve is fixed on the fixed end of the rolling mill is as follows: the sliding sleeve is directly connected with a radial bearing seat arranged at the fixed end of the rolling mill or connected with the radial bearing seat through a locking device.
9. The fixed type bending and shifting roller assembly structure according to claim 2, wherein two roller shifting devices symmetrically arranged on two sides of a central axis of the roller replace one roller shifting device coaxially arranged on the central axis of the roller, cylinder bodies of the two roller shifting devices are respectively fixed on a fixed end of a rolling mill, sliding sleeves of the two roller shifting devices act on thrust bearing blocks and axially shift together with the roller, and the sliding sleeves are axially matched with the cylinder bodies in a sliding manner through piston rods fixedly connected with the sliding sleeves; and a guide rod (25) which axially slides and radially limits is arranged between the thrust bearing seat and the adjacent radial bearing seat.
10. A fixed type roll shifting method of a bending-shifting roll, which is characterized in that based on the fixed type bending-shifting roll assembling structure according to any one of claims 2 to 9, the roll shifting method is as follows: when the rolling mill has a roll shifting, the roll shifting device drives the thrust bearing blocks and the thrust bearings on the thrust bearing blocks to axially shift together with the rolling roll, and the rolling roll axially slides relative to the two radial bearing blocks and the radial bearings on the radial bearing blocks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110518632.7A CN113070350B (en) | 2021-05-12 | 2021-05-12 | Fixed bending roll shifting assembly structure, roll shifting device and roll shifting method |
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| CN202110518632.7A CN113070350B (en) | 2021-05-12 | 2021-05-12 | Fixed bending roll shifting assembly structure, roll shifting device and roll shifting method |
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